Web-advancing mechanism for drying-frames.



B. H. c. H. BATHSFELD. WEB ADVANCING MECHANISM FOR DRYING FRAMES. APPLCATON FLED CT. 30, 1913. 1,167,216Q W Patented Jan. 4,'1916.

2 SHEETS--SHEET .I.

- COLUMBIA PLANOORAPH CD..WASHINGTON, D. C.

B. H. C. H. RATHSFELD. WEB ADVANCING MECHANISM FOR DRYING FRAMS.

APPLICATION FlLED-0CT. 30.'1913.

Pateted Jan. 4, 1916.`

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CDLUMBIA PLANOGRAPH co ASHINCITON n c wrr s ra rs rarnwr EEK),

BERTI-IOLZD HEINRICH CAEL'HERMANN narnrnnn, or nonnnansnv, GERMAN?.

WEB-ADVANCING MECI-IANISM'FOR DRYING-FRAMES. I

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In the frames hitherto employed for drying webs of paper or wovenfabrics hanging in long folds thesupporting bars 'carrying these foldswere advanced by means of chains or by' fingers which were pivoted toreciprocating frames, or by means of cams which were rigidly secured toreciprocating rods. j

The advancing of the supporting bars, by

means of chains had the 'disadvantage, that' the bars could fall downand the;chains could break. The method of advancing the" supporting barsby means of fingers pivoted to reciprocating frames entailed too manymoving and dust collecting parts above the 'support-ing bars and thematerial to be dried. The advancng of the supporting bars by means ofcams 'rigidly secured to reciprocating rods had the disadvantage, thatthe cam'rod had to have a dupleX motion', one longitudinally and onearound its own aXis; this necessitated a complicated journaling a'difficult lubrication and the restriction of the length of the stroke ofthe cam rod to the distance of the cams between each other so that thismethod could not beemployed at; all when the bars' were to'be arrangedvery close to each other. i

The new arrangement has the object of obviating these drawbaoks, byimparting to the rails carrying the supporting' bars a re-` ciprocatingmovement, and providing pawls on stationary rails, which pawls will'allow of the bars passing on their forward stroke, but will retain themat the return'stroke, or,

' when disengaged, will' discontinue the advance of thematerial beingdried.

The present improvement further afiords the advantage, that theattendance and lu-. brication are reduced to a minimum, so

' much the more if the rollers carrying the rails are fitted with ballbearings, and that the distance betweenthe supporting bars is determinedonly by the stroke of the connecting rods of the cranks reciprooatingthe' rai'ls, which stroke may be variable at wilL Speeificaton ofettersPatent. e Patenta@ 4 1915 Application filed October 30, 1913. Serial na.793344.

Accordingly whether the supporting bars and with' them the paper orfabrio webs shall be moved forward only or forward and backward, a setof lpawls is provided either for the forward travel only, or for theforward travel and thebackward travel each. a Byldisengaging the p awlsfor the forward travel and engagng the pawls for the backward travel,for nstance, the for-` ward travel will be discontinued' and thebackwardtravel. will be produced. Ifall pawls are disengaged, the travelof the Ina-` terial is entirely stopped."

The new 'possibilites for the movement of the paper webs hereby obtainedare of great importance inpractice, so much the more as it is therebyrendered possible to reverse the direction of the travel or disengagethe travel altogether in a very simple manner.

When the travel of? the supporting bars is stopped they will participatein the reciprocating' movement --of the supporting rails. The materialbeing dried is thereby swung to and fro and. will dry much faster,-

than if itwer to uniformlyv travel in one direction. The travel -is,therefore, stopped when the materialis not sufficiently dried in the'ordinary travel. i

After the material has been sufficiently dried and shall then beremovedfrom'the I drying room', the `pawlsfor the advance travel can 'bedisengaged and the travel be reversed. the 'supporting bars is stoppedfor ,producing a reciprocating movement of the ma terial being dried bydisengaging the pawls, for inst anee. by lifting these pawls with theaid ,of a rod provided with cams, so that the'supporting bars on thesupporting rail' The forward or'return travel of are not touched bythepawls and participate in the' reciprocatingmotion of said rail.

In order to' allow of a return travel of themateral under treatment,pawls' are prov1ded, wh1ch are arrangedn adirecton op-.

posite to that ofthe pawls for the forward movement, and also thesepawls are fitted with a lifting device of` knowndesign. The

- arrangenent .must be' such, 'that either by means of' the said liftingdevice the pawls i can be moved into such position, that either only thepawls 'for theforward travel are in` operative position, while the pawls for the return ,travel are disengaged, or vice versa, or, that bothsets of pawlsare disengaged, and the material under treatment s merelyswung to' and fro. The new arrangement is shown in the accompanyingdrawings in which- Figure l is a. front elevation of a constructionalform having only one set of pawls. Fig. 2 is a side elevation. Figs. 3and 4 illustrate a second constructional form of the arrangenent withone set of pawls. Fig. 5 is a side elevation of the arrangement with oneset of pawls each for the forward travel and for the return travelrespectvely, and Fig. 6 is a detail view with the pawls on an enlargedscale.

The operation of the new improved arrangement is as follows: To therails b, 25 carrying the supporting bars c, 0 0 0 for the material to bedried, and running on rollers a, a are rigidly secured lateralguideplates i, 71 (Figs. l and 2). The rails b, ?9 with the guide platesi, z' are reciprocated by means of connecting rods d adjustablyconnected to crank disk d to vary the stroke (Fig. 5). At the returnstroke of the rails Z), b the bar c, which has been raised by knownchain gears, is received bythe rails b, b a pawl f passing beneath thesaid bar c and rising behind it, so as to prevent the said bar c frommoving backward (Fig. 2). At the side of the web to be' dried and at apitch which corresponds to the'smallest distance, at which it is desiredto arrange the supporting bars c, pawls g, g 9 9 'are fitted to fixedrails h, ?L (Figs. 1, 2 and 3, i). During the forward stroke of therails b, b the supporting bars c, 0 0 0 resting on them are advanced,and pass clear beneath the pawls g, g 9 9 The pawls g, g 9 6 will thenretain the bars c, 0 0 0 when the rails I), '6 are performing theirreturn stroke. If the stroke' of the connecting rods d is increased, thesupporting rods c, 0 0 0 will during the forward stroke of the rails Z),b pass beneath two or more pairs of pawls instead of one single pair,whereby the distance between the supporting bars may be varied at will.The guide plates i, 7? rigidly secured to the sides of the rails I), band reciprocating therewith will at the same time prevent the supportingbars from being laterally displaced or from falling out.

From Figs. 3 and 4: it is evident that the pivoting point of the pawlsg, 9 9 g may also be arranged beneath the supporting rails I), 6 `When aseparate set of pawls is arranged, each, for the forward and the returntravel respectively (Figs. 5 and 6) the pawls g 9 9 9 are provided forthe advance travel of the supporting bars 0, 0 0 0 and the pawls g g g gare provided in a similar manner for the return travel. 'For disengagingthe pawls 5/ 9 g g during the advance of the material under treatment,or for disengaging the pawls g 9 9 9 during the return travel of thesaid material, and for disengaging both sets of pawls for swinging thematerial to and fre, two parallel rods 7; 15 areprovided.

As shown in Fig. 6, the bar ic is connected to the fixed rail 12, bylink Z and the other bar c is connected to said rail by links m. Thepawls are mounted between said bars and in Fig. 5 the bar k forOperating the pawls g 9 has been partially broken away for the sake ofclearness. By referring to Fig. 5, it will be seen that when the bar 10which is carried by the links m is moved to the right, by a lever n pinswhich project laterally from the bar engage the pawls (1 9 and rase thelatter out of the path of the supporting bars e. If the bar ic, which issupported by the links Z is moved to the left by a lever, the pawls g 9will be swung up, as indicated in dotted lines, Fig. 6, out of the pathof the bars e and the latter may be reciprocated by the rails b, bwithout being advanced on the latter in either direction.

I claim: r

l. In a web swinging and advancing mechanism for drying frames, thecombination of carrying rails, 'web-supporting bars loosely mounted onthe rails,` means for reciprocatingthe latter, pawls adapted to permitthe 'supporting bars to 'move with the rails in one direction and toretain the bars during the movement of the rails in the oppositedirection, and means to hold the pawls out of engagement with the barsto permit the latter to move with the rails in both directions.

2. In a web swinging and advancing mechanism for drying frames, thecombination of carrying rails, web-supporting bars loosely mounted onthe rails, means for reciprocating the latter, fixed rails adjacent thecarrying rails, pawls pivoted on the fixed rails and adapted to permitthe bars to move With the carrying rails during their forward stroke andto retain said bars during the return stroke of the carrying rails,means to hold the pawls out of engagement with the bars to permit thelatter to move with the rails to impart a swinging movement to the web,and pawls on receiving ends of the carrying rails adapted to passbeneath said bars during the return stroke of said carrying rails and toadvance the bars during the forward stroke.

3. In a web swinging and advancing mechanism for drying frames, thecombination of carrying rails, web-supporting bars loosely mounted onthe rails, means for reciprocating the latter, stationary supportingrails, two sets of pawls pivoted on the supporting rails, one set ofpawls arranged to allow the bars to pass unobstructed during theirforward stroke and to retain said bars during the return stroke of thecarrying rals, the other set of pawls arranged to allow said bars topass unobstructed during the return stroke and to retan said bars duringthe forward stroke of the carrying rals, pawls on the recevng ends ofthecarrying rails adapted to pass beneath the bars during the return strokeof said carrying rals and advance the bars during the for- 10 wardstroke, and an ndependently operable rod for each set of pawls to movethe latter;il into and out of engagement with the ro s.

In testmony whereof I have affixed my signature in presence of twowitnesses.

BERTHOLD HEINRICH CARL HERMANN RATHSFELD. Witnesses:

GUSTAV HUGKEN, ALFRED W. DONEGAN.

comes of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D; C. t

